/*
 *    Copyright 2024-2025, Warm-Flow (290631660@qq.com).
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.dromara.warm.flow.orm.keygen;

import com.mybatisflex.core.keygen.IKeyGenerator;
import com.mybatisflex.core.keygen.KeyGeneratorFactory;
import com.mybatisflex.core.keygen.KeyGenerators;
import org.dromara.warm.flow.core.keygen.KenGen;

/**
 * MybatisPlusIdGen
 *
 * @author warm
 */
public class MybatisFlexIdGen implements KenGen {

    private volatile IKeyGenerator keyGenerator;

    /**
     * 获取唯一ID
     * @return id
     */
    @Override
    public synchronized long nextId() {
        if (keyGenerator == null) {
            synchronized (KenGen.class) {
                if (keyGenerator == null) {
                    keyGenerator = KeyGeneratorFactory.getKeyGenerator(KeyGenerators.snowFlakeId);
                }
            }
        }
        return (long) keyGenerator.generate(null, null);
    }
}
